a British protectorate的用法和样例：
- He had been Governor of a British Protectorate.
- Zanzibar became independent, after being a British Protectorate since 1890.
- It became a British protectorate in1900 and gained independence in1970.
- Aden is a former British protectorate.
- Center of the widespread Malawi kingdom from the 15th to the late 18th century, the region became a British protectorate in 1891 and was known as Nyasaland from 1907 until 1964.